B-XRD 1101
Temperature-controlled XRD measurement using MiniFlex with 2D detector and BTS 500 Introduction The MiniFlex benchtop X-ray diffractometer can be used with the HyPix-400 MF high-speed two-dimensional detector and the BTS 500 temperature-control attachment (manufactured by Anton Paar), which enables measurements from room temperature to 500°C. With this desktop system, you can observe a phase transition of a substance due to temperature change in real time.
Measurements and results The diffraction pattern of magnesium chloride hexahydrate (MgCl2・6H2O) was measured while increasing the temperature, using the MiniFlex benchtop X-ray diffractometer, a HyPix-400 MF two-dimensional detector and a BTS 500 temperature control attachment (Fig. 1). As the temperature rises, the specimen, which was a hexahydrate at room temperature, became a tetrahydrate at around 90°C, a dihydrate at around 140°C, a monohydrate at around 200°C, and magnesium chloride hydroxide (MgCl(OH)) at around 270°C. The phase transitions due to dehydration were observed (Fig. 2).
Mg Cl2 ( H2 O )6
10
20
2(°)
Mg Cl2 ・4 H2 O
30
10
20
2θ (deg)
RT
2(°)
30
Fig. 1: The BTS 500 and the HyPix-400 MF on the MiniFlex
0
Mg Cl2 ・2 H2 O
10
20
2θ (deg)
MgCl2・6H2O
91°C
MgCl2・4H2O
138°C
Mg Cl2 ・ H2 O
10
20
198°C
2(deg) (°) 2θ
30
MgCl2・H2O
2(°)
30
2θ (deg)
MgCl2・2H2O
Mg O H Cl
10
20
271°C
2(deg) (°) 2θ
30
MgCl(OH)
Fig. 2: Result of temperature-controlled XRD measurement of magnesium chloride hexahydrate
Recommended equipment ► Benchtop X-ray Diffractometer MiniFlex + 2D Detector HyPix-400 MF + Temperature Control Attachment BTS 500 (O1115en)